Eaton HKD3400W Three Phase Molded Case Circuit Breaker

The Eaton HKD3400W is a three-phase molded case circuit breaker (MCCB) designed for electrical distribution where reliable protection is required. Identified by model HKD3400W, this device is a 3P MCCB rated at 400 amps, delivering three-pole interruption in a compact molded enclosure. As part of Eaton's HKD MCCB lineup, the HKD3400W provides the standard protection profile associated with these breakers, combining a molded case design with a high current rating suitable for mid-sized feeders and branch circuits. The 400 A rating defines the maximum continuous current the device is intended to carry before tripping, ensuring isolation of fault conditions and overloads to help protect wiring and connected equipment. Designed for mounting in standard electrical distribution assemblies, MCCBs like the HKD3400W interrupt current across all three phases when necessary, enabling safe disconnection of circuits under fault conditions. With three-pole operation and a 400 A rating, it supports consistent, predictable fault isolation in three-phase systems.